XmlSchemaAttribute XmlSchemaAttribute XmlSchemaAttribute XmlSchemaAttribute Class


Represents the attribute element from the XML Schema as specified by the World Wide Web Consortium (W3C). Attributes provide additional information for other document elements. The attribute tag is nested between the tags of a document's element for the schema. The XML document displays attributes as named items in the opening tag of an element.

public ref class XmlSchemaAttribute : System::Xml::Schema::XmlSchemaAnnotated
public class XmlSchemaAttribute : System.Xml.Schema.XmlSchemaAnnotated
type XmlSchemaAttribute = class
    inherit XmlSchemaAnnotated
Public Class XmlSchemaAttribute
Inherits XmlSchemaAnnotated


The following example creates the attribute element.

#using <mscorlib.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Xml;
using namespace System::Xml::Schema;

class XmlSchemaExamples

    static void Main()
        XmlSchema^ schema = gcnew XmlSchema();

        // <xs:attribute name="mybaseattribute">
        XmlSchemaAttribute^ attributeBase = gcnew XmlSchemaAttribute();
        attributeBase->Name = "mybaseattribute";

        // <xs:simpleType>
        XmlSchemaSimpleType^ simpleType = gcnew XmlSchemaSimpleType();
        attributeBase->SchemaType = simpleType;

        // <xs:restriction base="integer">
        XmlSchemaSimpleTypeRestriction^ restriction = gcnew XmlSchemaSimpleTypeRestriction();
        simpleType->Content = restriction;
        restriction->BaseTypeName = gcnew XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema");

        // <xs:maxInclusive value="1000"/>
        XmlSchemaMaxInclusiveFacet^ maxInclusive = gcnew XmlSchemaMaxInclusiveFacet();
        maxInclusive->Value = "1000";

        // <xs:complexType name="myComplexType">
        XmlSchemaComplexType^ complexType = gcnew XmlSchemaComplexType();
        complexType->Name = "myComplexType";

        // <xs:attribute ref="mybaseattribute"/>
        XmlSchemaAttribute^ attributeBaseRef = gcnew XmlSchemaAttribute();
        attributeBaseRef->RefName = gcnew XmlQualifiedName("mybaseattribute");

        XmlSchemaSet^ schemaSet = gcnew XmlSchemaSet();
        schemaSet->ValidationEventHandler += gcnew ValidationEventHandler(ValidationCallbackOne);

        XmlSchema^ compiledSchema;

        for each (XmlSchema^ schema1 in schemaSet->Schemas())
            compiledSchema = schema1;

        XmlNamespaceManager^ nsmgr = gcnew XmlNamespaceManager(gcnew NameTable());
        nsmgr->AddNamespace("xs", "http://www.w3.org/2001/XMLSchema");
        compiledSchema->Write(Console::Out, nsmgr);

    static void ValidationCallbackOne(Object^ sender, ValidationEventArgs^ args)

int main()
    return 0;
using System;
using System.Xml;
using System.Xml.Schema;

class XMLSchemaExamples
    public static void Main()

        XmlSchema schema = new XmlSchema();

        // <xs:attribute name="mybaseattribute">
        XmlSchemaAttribute attributeBase = new XmlSchemaAttribute();
        attributeBase.Name = "mybaseattribute";

        // <xs:simpleType>
        XmlSchemaSimpleType simpleType = new XmlSchemaSimpleType();
        attributeBase.SchemaType = simpleType;

        // <xs:restriction base="integer">
        XmlSchemaSimpleTypeRestriction restriction = new XmlSchemaSimpleTypeRestriction();
        simpleType.Content = restriction;
        restriction.BaseTypeName = new XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema");

        // <xs:maxInclusive value="1000"/>
        XmlSchemaMaxInclusiveFacet maxInclusive = new XmlSchemaMaxInclusiveFacet();
        maxInclusive.Value = "1000";

        // <xs:complexType name="myComplexType">
        XmlSchemaComplexType complexType = new XmlSchemaComplexType();
        complexType.Name = "myComplexType";

        // <xs:attribute ref="mybaseattribute"/>
        XmlSchemaAttribute attributeBaseRef = new XmlSchemaAttribute();
        attributeBaseRef.RefName = new XmlQualifiedName("mybaseattribute");

        XmlSchemaSet schemaSet = new XmlSchemaSet();
        schemaSet.ValidationEventHandler += new ValidationEventHandler(ValidationCallbackOne);

        XmlSchema compiledSchema = null;

        foreach (XmlSchema schema1 in schemaSet.Schemas())
            compiledSchema = schema1;

        XmlNamespaceManager nsmgr = new XmlNamespaceManager(new NameTable());
        nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema");
        compiledSchema.Write(Console.Out, nsmgr);

    public static void ValidationCallbackOne(object sender, ValidationEventArgs args)

Option Explicit On
Option Strict On

Imports System.Xml
Imports System.Xml.Schema

Class XMLSchemaExamples
    Public Shared Sub Main()
        Dim schema As New XmlSchema()

        ' <xs:attribute name="mybaseattribute">
        Dim attributeBase As New XmlSchemaAttribute()
        attributeBase.Name = "mybaseattribute"

        ' <xs:simpleType>
        Dim simpleType As New XmlSchemaSimpleType()
        attributeBase.SchemaType = simpleType

        ' <xs:restriction base="integer">
        Dim restriction As New XmlSchemaSimpleTypeRestriction()
        simpleType.Content = restriction
        restriction.BaseTypeName = New XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema")

        ' <xs:maxInclusive value="1000"/>
        Dim maxInclusive As New XmlSchemaMaxInclusiveFacet()
        maxInclusive.Value = "1000"

        ' <xs:complexType name="myComplexType">
        Dim complexType As New XmlSchemaComplexType()
        complexType.Name = "myComplexType"

        ' <xs:attribute ref="mybaseattribute"/>
        Dim attributeBaseRef As New XmlSchemaAttribute()
        attributeBaseRef.RefName = New XmlQualifiedName("mybaseattribute")

        Dim schemaSet As New XmlSchemaSet()
        AddHandler schemaSet.ValidationEventHandler, AddressOf ValidationCallbackOne


        Dim compiledSchema As XmlSchema = Nothing

        For Each schema1 As XmlSchema In schemaSet.Schemas()
            compiledSchema = schema1

        Dim nsmgr As New XmlNamespaceManager(New NameTable())
        nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema")
        compiledSchema.Write(Console.Out, nsmgr)
    End Sub

    Public Shared Sub ValidationCallbackOne(ByVal sender As Object, ByVal args As ValidationEventArgs)

    End Sub
End Class

The following XML file is generated for the preceding code example.

<?xml version="1.0" encoding="IBM437"?>
<xs:schema  xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:attribute name="mybaseattribute">
            <xs:restriction base="xs:integer">
                <xs:maxInclusive value="1000" />
    <xs:complexType name="myComplexType">
        <xs:attribute ref="mybaseattribute" />


Attribute declarations can be present as child elements of the schema element (having global scope) or within complex type definitions. For complex types, attribute declarations can be present as local declarations or references to attributes with global scope. Both global and local attribute declarations have the optional type attribute that refers to an existing simple type. If the optional type attribute is not used, the attribute declaration (global or local) must define a local simple type.


XmlSchemaAttribute() XmlSchemaAttribute() XmlSchemaAttribute() XmlSchemaAttribute()

Initializes a new instance of the XmlSchemaAttribute class.


Annotation Annotation Annotation Annotation

Gets or sets the annotation property.

(Inherited from XmlSchemaAnnotated)
AttributeSchemaType AttributeSchemaType AttributeSchemaType AttributeSchemaType

Gets an XmlSchemaSimpleType object representing the type of the attribute based on the SchemaType or SchemaTypeName of the attribute.

AttributeType AttributeType AttributeType AttributeType

Gets the common language runtime (CLR) object based on the SchemaType or SchemaTypeName of the attribute that holds the post-compilation value of the AttributeType property.

DefaultValue DefaultValue DefaultValue DefaultValue

Gets or sets the default value for the attribute.

FixedValue FixedValue FixedValue FixedValue

Gets or sets the fixed value for the attribute.

Form Form Form Form

Gets or sets the form for the attribute.

Id Id Id Id

Gets or sets the string id.

(Inherited from XmlSchemaAnnotated)
LineNumber LineNumber LineNumber LineNumber

Gets or sets the line number in the file to which the schema element refers.

(Inherited from XmlSchemaObject)
LinePosition LinePosition LinePosition LinePosition

Gets or sets the line position in the file to which the schema element refers.

(Inherited from XmlSchemaObject)
Name Name Name Name

Gets or sets the name of the attribute.

Namespaces Namespaces Namespaces Namespaces

Gets or sets the XmlSerializerNamespaces to use with this schema object.

(Inherited from XmlSchemaObject)
Parent Parent Parent Parent

Gets or sets the parent of this XmlSchemaObject.

(Inherited from XmlSchemaObject)
QualifiedName QualifiedName QualifiedName QualifiedName

Gets the qualified name for the attribute.

RefName RefName RefName RefName

Gets or sets the name of an attribute declared in this schema (or another schema indicated by the specified namespace).

SchemaType SchemaType SchemaType SchemaType

Gets or sets the attribute type to a simple type.

SchemaTypeName SchemaTypeName SchemaTypeName SchemaTypeName

Gets or sets the name of the simple type defined in this schema (or another schema indicated by the specified namespace).

SourceUri SourceUri SourceUri SourceUri

Gets or sets the source location for the file that loaded the schema.

(Inherited from XmlSchemaObject)
UnhandledAttributes UnhandledAttributes UnhandledAttributes UnhandledAttributes

Gets or sets the qualified attributes that do not belong to the current schema's target namespace.

(Inherited from XmlSchemaAnnotated)
Use Use Use Use

Gets or sets information about how the attribute is used.


Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)

Applies to